Labor Day - 2019 GLC300W - Good / Bad / Improve?

Waiting for best time to Lease 2019 GLC 300 2WD. No exact fit (price / features) at dealership wife uses, yesterday they offered new:

2019 GLC300W - List with Options - Dest. & Delivery : $49,100, after discount $41,936. Lease: $548, 36 Months, $3,770 due at signing.

They offer another 9% discount for single pay - which takes off $60 / month. I would do this if single pay was OK - but read not good to do because you “could” loose.

Can I ask - good deal or bad (negotiate more)? Tips or tricks to get best deal? Have follow-up Monday 9/2 / Atlanta, GA

Thanks

Don’t stick to just one dealer.
Look at the electric version as they lease better.